Type-bar mechanism.



0. $1 1110. TYPE BAR MECHANISM. APPLICATION FILED JULY 29,1910.

Patented M81228, 1911.

2 SHEETS-SHEET 1 G. SPIRO. TYPE BAR MECHANISM. APPLICATION PIIIED JULY 29. 1910.

Patented Mar. 28, 1911.

- 2 SHEETS-SHEET I typewriting machines and specifically to ed. in a unitary structure or segment that is.

' ti'iii rn CHARLES srrno or'ivnw ionic. N. Y:

TYPE-BAR MECHANISM.

TooZZ whom it may concern:

zen of the United States, residing York, county of New York, State of New York, have invented certain new and useful Improvements in Type-Bar' Mechanisln, of which the following is a 'specification, refer- .cnce being had: therein to the accompanying drawing.

. This invention relates broadly to the art type bar actuating mechanism particularly to construct a type bar mechanism for a typewr'iting' machine in such manner that the type bar hangers, the actuating sub-1e, vers and the universal-bar may all be mountadapteda to'be introduced into and removed from the machine frame as a unit structure.

Another object of thisinventipn is to c011- struct an actuating mechanism for the, type bars in ,such manner) as to permit the type bar hangers to 'be arranged upon-a segment .of a small are, thus permitting, the use of 7 short light type bars and at the same time arranging the segment in such manner as to permit the use of long 'plvots in the type barhangerst ;Another object of this invention is to construct. an' actuating mechanism for front strike type bars which are arranged upon a segment of a small are in such manner as to form a uniformltouch over the various keys in the key board.

Another object of this invention is to arrange the type bars of a front strike typewri'ting machine upon a segmentof a small arc, and to mount the actuating sublever for the type bars upon the segment of a greater are in such manner as to evenly distribute torsional strains throughout the various pivotal connections of the actuating mechanism for each particular type bar. v

stnother object'ot this invention is to construct an actuating mechanism for type bars particularly adapted for front strike typewriting machines, in such manner as to use actuating sub-leve1fs of graduated 'lengthsso Specification of Letters Patent.

Application filed Ju1y 29,19 10. Serial No,

Patented Mar. 28, 1911. 574,524.

constructed that each sub-lever turns through Be it known that I, CHARLES Srino, a citrat New,

an equal angular movement during the actuation of each type'bar throughout the type bar system.

A further object of this/invention is to construct an actuating mechanismfor type bars particularly adapted for front strike typewriting machines, in such manner that the actuating snb-levers of the mechanism are graduated and arranged in such manner as to pick. up the universal bar When the type bars have moved through a definite pie-determined distance in'moving from the position of rest on the type bar rest to the printing points I A stillfurtherobject of this invention'is to construct anactuating mechanism, for type bars for use in a front strike typewriting machine, in su'cli manner that the type barlhangers are arranged upon a segmentof arranged upon a segment of a larger arc and are adaptedto operate a pivoted universal barhaving a contact face in substantially a straight line beneath a segment of theaetu at'ing levers. t v r Still other and further objects of this inyention will in part be obvious and will which follows hereinafter, by reference to the accompanyingdrawings in which like characters are used to represent like parts throughout the several figures, and the scope *ofthe inventiomwill' b'eindic-ated by the zip: pended claims.

the type bar actuating mechanism in longitudinal sectional elevation; Fig. 2 is a View showing aportion of the type bar actuating mechanism in transverse elevation. Fig. 3 is a transverse sectional elevation showing the relationship of the segments and actuating. links.

Referring particularlyto Fig. 3 ot'the drawings. a segmental trame 1,'is provided with wing portions 2 and 4, that are adapted to be seated upon abutment members 5 and G, that are 'formed integral with sides T and 8 of the machine frame, and armadapted to be firmly held in fixed position in the mam' pa'rt be pointed outin che specification Figure 1 isa view showing a portion 0t a small arc, the actuating sub-levers. being chine'frame by means of stud'bolts 9 and 10, wh ch pass through openings in the wing port-ions 2 and 4, and bolt into the abutis also .provided with supporting posts 11 and'll, which are adapted-to carry a .top'

plate 14, upon which is mounted for reciprocation the usual platen and carriage mecha-" nism 15. .However, as theseiparts do not form a specific part of the combination of the present invention,

they have only been illustrated diagranmiatically, and further description is thought to be unnecessary.

Referring particularly to the segmental,

frame 1, it is comprised of a type bar hanger segment 1 G, that is constructed in the nature of a portion of a cylinder, beneath and to the rear ofwhich is carried a sub-lever -segmeat 17. which is formed upon anarc haymg a greater radius of curvature than the radius of the are upon which the type barhanger segment 1s constructed. The type bar hanger segment 16,- is constructed in such manner as to permit type bar hangers 18 'to be located in parallel planes which cut its interior surface at right anglesto the axis of the cylinder about which the type bar hanger segment is formed. A series of curved type bars 19, all of which are of uniform length, are mounted upon long pivot members 20, that are pivotally attached to the type bar hangers 18. The type bars '19, are formed with clearance curves near their outer ends, and-are provided .beyond these curves with socket portions 21. in which are mounted the usual type head 22. The sub-lever segment 17,

with slots upon its rear edge. which constitute guiding means for the sub-levers 24:.

wire 25, which is located in a retaining groove formed near the rear edge of the sublever segment. The sub-levers 24 are operatlvely connected at their upper ,ends by means of connecting llnks 2G. to the type bars. and at their lower or middle portions the sub-levers 17 are eonnectedto keylevers 27 by means of connecting links 28. The key leversQT are provided upon-their forward ends with the well known form of key caps (not shown in the drawings), and are'pivoted at their rearends beneath a pivotal support 29, which is mounted in the machine frame. Key lever returning springs 30, are. adapted to be suspended from supporting members '31, and are attached at their'lower ends to the key levers '27 in such manner as to return the key levers to normal position after they have been actuated for the printing operation. A substantially horizontal or straight universal bar bar hanger segment is is formed treme sides of the system.

32, is pivoted upon the wing portions? and A of the segmental frame 1, andis arranged to lie beneath downward extending portions 34 of the sub-levers 24, in such manner that the downwardly extending portions 34:, will contactwith the, face of the universal bar when the type" head'upon. the type bar has traveled:a pre-determined distance in its path of movement from rest to the printing point, thu s rocking the universal bar to actuate ribbon' nechanism and escapement ineclr amsm (not shown in the drawings), at a definite-time in each printing operation.

Referring particularly to Figs. 1 and 30f the drawings, it will be noted that the type ment of an unusually small are, and that sutiicient space is gained for the long pivots of the type bars by lacing the type bar hangers in different p anes' in the segment, The advantage of the'small segment is that it permits a short and lighttype bar to he used. thus making a, light key action. However. in the use'o f a small segment for the type bar-hanger, difficulty is experienced in securing a sutficient fanning out of the actuating links and sub-levers to properly connect with the key levers without causing an extreme amount of torsional strain.

Referring particularly to Fig. 3, it will be noted that thearrangemcnt of the sub-levers 24. upon the pivot. wire 25, carried' in the sub-lever segment 17, is suchthat the angular relationship of the sub-levers to the type; bar connections-and to the key lever connections. is such as to substantially balance oreq-ually distribute the torsional strains throughout the various pivotal points-ofthe connections. --This particular feature is especially noticeable in the arrangemena of links and actuating sub-levers at the ex- 7 I It will also be noted upon referring to Fig. 3. that while the sub-lever segment 17 is curved, tlu

universal bar 32 which adapted to be actuated by the downwardly extending portions 34 of the sub-lever Q lQis a straight line. as has been hereinbefore set forth. Since the universal bar is formed St\l)St':Ui-' tiall v straight and is pivoted below the contact face, it will be seen that a predetermined amount of movement at any pointlon the actuating face 'will give a predetermined amountof angular movement to the pivotal supports. Such a conditionis not true for a pivot-ally mounted curved universal bar. The sub-levers'Q, as has been hereinbefore specified. are formed of gradually increa ing size from the middle of the segment to the'sides thereof. The increase of the dis-- tance fronrthe connection to the type-bar link to the pivot wire the increase from the key lever comm-lion to'the pivot 25. and also the distance from the pivot wire '25 to the topfof the universal formed upon a is propm'tional to names bar 32 isproportional to the increase in length between thepivotal points hereinbe- "fore Specified." In othergwords, the entire relationship of the various controlled and r V controlling elements of the sub-levers 1, is

'propor tionately increased from the middle of the segment to the sides thereef, and the. arrangement of parts such that the Whole of'the system is in a uniform relationship so as to git'e a uniform touch throughout the entlrekey board (not shown).

Having thus descrlbed my. llivei tlon What I desire'to c aim is 1. In a ,typewritlng machine, the combination of a, main frame, a segmental frame' mounted thereon and provided with a type bar hanger segment, a sublever segment, said sub-lever segment being. formed upon a radius of curvature greater thanjthe. radius of curvature of the type bar hanger segment, type bars pivotally mounted upon said type bar hanger; segment, sub-levers pivotally .mounted" upon said sublever segment to' swing'in .plan'esradialto the sub-lever segment, operative connections between said sub-levers and said type bars, the axis of the pivot for each of said connections with the sub-levers being parallel with the axis of its pivot in the corresponding type bar, anti means for actuating said sub-levers.

2. A type bar action fortypewriting machines, including type bars, pivotal' means for said type bars arranged in substantially an arc, actuating sub-levers, pivotal means for said actuating sub-levers substantlally arranged in an arc having a greater radius i of curvature than the arc upon which the type bar pivots are located, a straight line universal bar adapted to be operated by said sub-levers, means connecting said sub-levers and said type bars, and means for actuating said sub-levers, substantially as described.

- 3. In a typewritmg machine, the combmation of a main-frame, a type bar hangersegment, a sub-lever segment, type bars pivotally mounted upon said type bar hanger segment, sub-levers pivotally mounted upon said sub-lever segment, operative means connecting said sub-levers and said type bars, a

universal b'ar having its contact face formed u n l I L 111 substantially a stralght line. and in the path of said sub-levers, and means for actu-.

located beneathsaid sub-leversegment and adapted to be actuated by said sub-levers. operative means between said sub-levers and said type bars, and'means for actuating said su-b-levers, substantially as described.

"5. In' a typewriti'ng machine, the combina: tion of a main frame, a segmental frame provided .with a type bar hanger segment 0 and a sub-lever segment, type bars pivotally mounted upon said type bar hanger segment, I sub-levers pivotally mounted upon'said'sublever segment, said sub-levers being operatively connected vto vsaid type bars, key levers, and links inovableih' the direction of. their length and connecting said sublevers to' said key levers;

(3. In a typewriting machine, the combination of. a main frame, a segmental frame car- 0 ried thereby, a concave type bar segment formed upon said segmental frame, a sublever segment also formed upon sa d seg-' -mental frame, said sub-lever segment being located upon the segmental frame at a position belovv 531d concave type bar. segment, and means 'for fixedly mounting said seg- -mental frame in said main frame.

7. Ina typewri-ting machine,the combina- I tion of amai n frame, a segmental frame carried thereby, a type bar hanger segment formed upon said segmental-frame, a sublever segment formed upon said segmental frame, said sub-lever-segment being located below andformed upon an arc ofgreater radius and. having its center at a different elevation than the are upon which said type bar hanger segment is formed, and means for attaching said segmental frame in said main frame.

S. In a typewriting machine,the combination Lof a main frame, a segmental frame,

ty 'gse bars operatively mounted upon said segmental frame, actuatingsub-levers for' said type bars pivot'ally mounted upon said a segmental frame, a universal bar carried by. said segmental frame and adapted to be actuated by said actuating sub-levers, operative connections between s'aid actuating' sublevers-and saidtype bars, means for actuating'said sub-levers, and means for fixedly mounting said segmental frame. in said main frame, 9. In a typewritiiig machine, the combination of. a main frame, a segmental frame fixedly mounted thereon, type bar. hangers mounted on the upperface of said segmental fram'e, type bars pivotally mounted'm' said ,hangers, sub-levers pivotally mounted along one side 'ofsaid segmental frame, means above said segmental frame for operatively connecting each sub-lever to its associated type bar, and actuating means mounted in the main frame and operativelyconnected to the sub-levers. i

10. In a typewriting, machine, the combination of a main frame, a segmental frame fixedly mounted thereon, type bar hangers mounted on the inner side of said segmental frame, type bars pivotally mountedin said hangers, sub-levers pivofa lly lnounted along In testimony whereof I-afiix my signature one side of said segmental frame, means on in presence of two witnesses.

the npper slde of sand segmental frame for Y operfitively connecting each sub-lever to its CHARLES SPIRO' 5 associated type bar, and actuating means Witnesses: mounted in the mainframe and operatively EDWD. E. JONES,

connected to the sub-levers. FRAXK H. 0012315. 

